Several planes had trouble landing at the airport at the time of the crash. The Inter-State Aviation Committee said in a statement that the plane's data and voice recorders had been heavily damaged in the crash.

But Sergei Zaiko, deputy chairman of the committee, was quoted by Russian news agencies Sunday as saying that the quality of material on the data recorder was high.

Russian investigators and policemen collect remains of bodies and inspect a site of the crash of Boeing 737-800 of FlyDubai airliner. (STR/EPA)